JAVA使用ffmepg处理视频的方法(压缩,分片,合并)
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FFmepg安装
路径：
然后在使用的类中生命一个全局变量就好
private static String ffmpegPath = "C:\\hk\\ffmpeg\\bin\\ffmpeg.exe"; //ffmepg的绝对路径视频压缩
注意：此压缩视频涉及转码，对cpu的占用比较大（能不压缩尽量不压缩）
public static void toCompressFile(String convertFile,String targetFile) throws IOException {
List<String> command = new ArrayList<String>();
command.add(ffmpegPath);
command.add("-i");
command.add(convertFile);
command.add("-r");
command.add("15");
command.add("-b:v");
command.add("600k");
command.add("-s");
command.add("1280x720");
command.add(targetFile);
ProcessBuilder builder = new ProcessBuilder(command);
Process process = null;
try {
process = builder.start();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// 使用这种方式会在瞬间大量消耗CPU和内存等系统资源，所以这里我们需要对流进行处理
InputStream errorStream = process.getErrorStream();
InputStreamReader inputStreamReader = new InputStreamReader(errorStream);
BufferedReader br = new BufferedReader(inputStreamReader);
String line = "";
while ((line = br.readLine()) != null) {
}
if (br != null) {
br.close();
}
if (inputStreamReader != null) {
inputStreamReader.close();
}
if (errorStream != null) {
errorStream.close();
}
logger.info("-------------------压缩完成---转存文件--"+targetFile+"-------------");
}获取视频合并
public static String mergeVideo(List<String> list, String outputDir, String outputFile) {
try {
String format1 = "%s -i %s -c copy -bsf:v h264_mp4toannexb -f mpegts %s";
List<String> commandList = new ArrayList<>(6);
List<String> inputList = new ArrayList<>(6);
for (int i = 0; i < list.size(); i++) {
String input = String.format("input%d.ts", i + 1);
String command = String.format(format1, ffmpegPath, list.get(i), outputDir + input);
commandList.add(command);
inputList.add(input);
}
String command = getCommand(outputDir,outputFile, inputList);
commandList.add(command);
Boolean falg = Boolean.FALSE;
for (int i = 0; i < commandList.size(); i++) {
if (execCommand(commandList.get(i)) > 0) falg = true;
}
if (falg) {
for (int i = 0; i < inputList.size(); i++) {
if (i != commandList.size() - 1) {
File file = new File(outputDir + inputList.get(i));
file.delete();
}
}
// //删除压缩的文件
// for (String s:list
// ) {
// new File(s).delete();
// }
return outputFile;
} else {
return "fail";
}
} catch (Exception e) {
e.printStackTrace();
logger.error("-----合并失败!!!!!!" + outputFile);
return "fail";
}
}
private static Integer execCommand(String command) {
logger.info("execCommand.exec command={}",command);
try {
Process process = Runtime.getRuntime().exec(command);
//获取进程的标准输入流
final InputStream is1 = process.getInputStream();
//获取进城的错误流
final InputStream is2 = process.getErrorStream();
//启动两个线程，一个线程负责读标准输出流，另一个负责读标准错误流
readInputStream(is1);
readInputStream(is2);
process.waitFor();
process.destroy();
logger.info("-----操作成功" + command + " " + sdf.format(new Date()));
return 1;
} catch (Exception e) {
e.printStackTrace();
System.out.println("-----操作失败" + command);
return -1;
}
}
private static void readInputStream(InputStream inputStream) {
new Thread(() -> {
BufferedReader br1 = new BufferedReader(new InputStreamReader(inputStream));
try {
String line1;
while ((line1 = br1.readLine()) != null) {
if (line1 != null) {
}
}
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
inputStream.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}).start();
}视频分片（分割）
public static List<Map<String,Object>> splitVideoFile(String fileName, String outputPath, float videoTime, int periodTime, boolean merge) {
final String TAG = "----------------------------";
// 在outputPath路径下根据系统时间创建目录
File file = createFileBySysTime(outputPath);
if (file == null) {
System.out.println("分割视频失败，创建目录失败");
return null;
}
outputPath = file.getPath() + File.separator; // 更新视频输出目录
// 计算视频分割的个数
int count;// 分割为几段
float remain = 0; // 不足一次剪辑的剩余时间
if (merge) {
count = (int) (videoTime / periodTime);
remain = videoTime % periodTime; // 不足一次剪辑的剩余时间
} else {
count = (int) (videoTime / periodTime) + 1;
}
System.out.println("将视频分割为" + count + "段，每段约" + periodTime + "分钟");
String indexName; // 第 i 个视频，打印日志用
final String FFMPEG = ffmpegPath;
String startTime; // 每段视频的开始时间
String periodVideoName; // 每段视频的名字，名字规则：视频i_时间段xx_yy
float duration; // 每次分割的时长
String command;// 执行的命令
// 得到视频后缀 如.mp4
String videoSuffix = fileName.substring(fileName.lastIndexOf("."));//得到点后面的后缀，包括点
Runtime runtime = Runtime.getRuntime(); // 执行命令者
List<Map<String,Object>> list =new ArrayList<>();
// 将视频分割为count段
for (int i = 0; i < count; i++) {
Map<String,Object> map =new HashMap<>();
indexName = "第" + (i+1) + "个视频";
// 决定是否将整个视频结尾部分不足一次的时间，合并到最后一次分割的视频中
if (merge) {
if (i == count - 1) {
duration = periodTime * 60 + remain * 60;// 将整个视频不足一次剪辑的时间，拼接在最后一次剪裁中
if(periodTime * i /60 >= 1){
startTime = "0"+periodTime * i /60+ ":00:00";
}else{
startTime = periodTime * i + ":00";
}
periodVideoName = "video" + (i+1) + "_" + periodTime * i + "_end" + videoSuffix;
} else {
duration = periodTime * 60;
if(periodTime * i /60 >= 1){
startTime = "0"+periodTime * i /60+ ":00:00";
}else{
startTime = periodTime * i + ":00";
}
periodVideoName = "video" +(i+1) + "_" + periodTime * i + "_" + periodTime * (i + 1) + videoSuffix;
}
} else {
duration = periodTime * 60;
if(periodTime * i /60 >= 1){
startTime = "0"+periodTime * i /60+ ":00:00";
}else{
startTime = periodTime * i + ":00";
}
periodVideoName = "video" + (i+1) + "_" + periodTime * i + "_" + periodTime * (i + 1) + videoSuffix;
}
// 执行分割命令
try {
// 创建命令
command = FFMPEG + " -ss " + startTime +" -accurate_seek "+ " -i " + fileName + " -c copy -t " + duration + " " + outputPath + periodVideoName;
System.out.println(TAG);
System.out.println(indexName);
System.out.println("执行命令：" + command);
runtime.exec(command);
System.out.println(indexName + "分割成功");
map.put("videoPath",(outputPath + periodVideoName).replace("\\","/"));
map.put("count",i);
list.add(map);
} catch (Exception e) {
e.printStackTrace();
System.out.println(indexName + "分割失败!!!!!!");
}
}
//删除原来的大视频
new File(fileName).delete();
return list;
}
public static File createFileBySysTime(String path) {
// 1. 读取系统时间
Calendar calendar = Calendar.getInstance();
Date time = calendar.getTime();
// 2. 格式化系统时间
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss");
String fileName = format.format(time); //获取系统当前时间并将其转换为string类型,fileName即文件名
// 3. 创建文件夹
String newPath = path + fileName;
File file = new File(newPath);
//如果文件目录不存在则创建目录
if (!file.exists()) {
if (!file.mkdir()) {
System.out.println("当前路径不存在，创建失败");
return null;
}
}
System.out.println("创建成功" + newPath);
return file;
}获取视频的时长
public static long getVideoDuration(File video) {
long duration = 0L;
FFmpegFrameGrabber ff = new FFmpegFrameGrabber(video);
try {
ff.start();
duration = ff.getLengthInTime() / (1000 * 1000 * 60);
ff.stop();
} catch (FrameGrabber.Exception e) {
e.printStackTrace();
}
return duration;
}视频剪切
public static String videoClip(String videoInputPath,String startTime,String endTime,String devIp) throws IOException {
SimpleDateFormat sdf1=new SimpleDateFormat("yyyy-MM-dd");
SimpleDateFormat dtf=new SimpleDateFormat("yyyyMMddHHmmss");
//判断转码文件是否存在
if(!new File(videoInputPath).exists()){
System.out.println("需要处理的视频不存在");
return null;
}
StringBuffer videoOutPath = new StringBuffer();
videoOutPath.append("C:/video/playBack/"+devIp+"/"+sdf1.format(new Date())+"/clip/");
File file = new File(videoOutPath.toString());
if (!file.exists()){
file.mkdirs();
}
videoOutPath.append(dtf.format(new Date())+".mp4");
List<String> command = new ArrayList<String>();
command.add(ffmpegPath);
command.add("-ss");
command.add(startTime);
command.add("-t");
command.add(endTime);
command.add("-i");
command.add(videoInputPath);
command.add("-c");
command.add("copy");
command.add(videoOutPath.toString());
command.add("-y");
ProcessBuilder builder = new ProcessBuilder(command);
Process process = null;
try {
process = builder.start();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
InputStream errorStream = process.getErrorStream();
InputStreamReader inputStreamReader = new InputStreamReader(errorStream);
BufferedReader br = new BufferedReader(inputStreamReader);
String line = "";
while ((line = br.readLine()) != null) {
}
if (br != null) {
br.close();
}
if (inputStreamReader != null) {
inputStreamReader.close();
}
if (errorStream != null) {
errorStream.close();
}
return videoOutPath.toString();
}视频转GIF（MP4）
public static String mp4ToGif(String inputVideoPath,String createGif) {
String name = UUID.randomUUID().toString().replaceAll("-", "");
String paletteFile = createGif +name + ".png";
String gifFile = createGif+name + ".gif";
boolean isComplete = false;
//操作ffmpeg生成gif图片
for (int i = 0; i < 5; i++) {
try {
//生成调色板
Process p = new ProcessBuilder()
.command(ffmpegPath,
"-v", "warning",
"-ss", "2",
"-t", "10",
"-i", inputVideoPath,
"-vf", "fps=5,scale=400:-1:flags=lanczos,palettegen",
"-y", paletteFile, "-vn")
.redirectError(new File("stderr.txt"))
.start();
isComplete = p.waitFor(10, TimeUnit.SECONDS);
if (!isComplete) {
System.out.println("生成调色板出错");
} else {
List<String> command = new ArrayList<String>();
command.add(ffmpegPath);
command.add("-v");
command.add("warning");
command.add("-ss");
command.add("2");
command.add("-t");
command.add("10");
command.add("-i");
command.add(inputVideoPath);
command.add("-i");
command.add(paletteFile);
command.add("-lavfi");
command.add("fps=5,scale=400:-1:flags=lanczos [x]; [x][1:v] paletteuse");
command.add("-y");
command.add(gifFile);
command.add("-vn");
ProcessBuilder builder = new ProcessBuilder(command);
Process process = null;
try {
process = builder.start();
isComplete = process.waitFor(10, TimeUnit.SECONDS);
if (isComplete) {
new File(paletteFile).delete();
System.out.println("生成gif成功");
break;
} else {
System.out.println("生成gif出错");
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
// process = new ProcessBuilder()
// .command(ffmpegPath,
// "-v", "warning",
// "-ss", "2",
// "-t", "10",
// "-i", "E:\\Video_2021-05-14_113013.mp4",
// "-i", paletteFile,
// "-lavfi", "fps=5,scale=400:-1:flags=lanczos [x]; [x][1:v] paletteuse",
// "-y", gifFile, "-vn")
// .redirectError(new File("stderr.txt"))
// .start();
// isComplete = process.waitFor(10, TimeUnit.SECONDS);
// if (isComplete) {
// System.out.println("生成gif成功");
// break;
// } else {
// System.out.println("生成gif出错");
// }
}
} catch (Exception e) {
System.out.println("生成gif出错");
}
}
return gifFile;
}以上就是JAVA使用ffmepg处理视频的方法(压缩,分片,合并)的详细内容，更多关于java ffmepg处理视频的资料请关注编程网其它相关文章！
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